diff --git a/lib/index.js b/lib/index.js
index d347ceb..118666d 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -108,7 +108,7 @@ async function writeFileAsync (filename, data, options = {}) {
     if (options.tmpfileCreated) {
       await options.tmpfileCreated(tmpfile)
     }
-    if (Buffer.isBuffer(data) || ArrayBuffer.isView(data)) {
+    if (ArrayBuffer.isView(data)) {
       await promisify(fs.write)(fd, data, 0, data.length, 0)
     } else if (data != null) {
       await promisify(fs.write)(fd, String(data), 0, String(options.encoding || 'utf8'))
@@ -210,7 +210,7 @@ function writeFileSync (filename, data, options) {
     if (options.tmpfileCreated) {
       options.tmpfileCreated(tmpfile)
     }
-    if (Buffer.isBuffer(data) || ArrayBuffer.isView(data)) {
+    if (ArrayBuffer.isView(data)) {
       fs.writeSync(fd, data, 0, data.length, 0)
     } else if (data != null) {
       fs.writeSync(fd, String(data), 0, String(options.encoding || 'utf8'))